Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/81123
Title: The roles of lithium-philic giant nitrogen-doped graphene in protecting micron-sized silicon anode from fading
Authors: Liu, Xiaoxu
Chao, Dongliang
Zhang, Qiang
Liu, Hai
Hu, Hailong
Zhao, Jiupeng
Li, Yao
Huang, Yizhong
Lin, Jianyi
Shen, Ze Xiang
Issue Date: 2015
Source: Liu, X., Chao, D., Zhang, Q., Liu, H., Hu, H., Zhao, J., et al. (2015). The roles of lithium-philic giant nitrogen-doped graphene in protecting micron-sized silicon anode from fading. Scientific Reports, 5, 15665-.
Series/Report no.: Scientific Reports
Abstract: A stable Si-based anode with a high initial coulombic efficiency (ICE) for lithium-ion batteries (LIB) is critical for energy storage. In the present paper, a new scalable method is adopted in combination with giant nitrogen-doped graphene and micron-size electrode materials. We first synthesize a new type of freestanding LIB anode composed of micron-sized Si (mSi) particles wrapped by giant nitrogen-doped graphene (mSi@GNG) film. High ICE (>85%) and long cycle life (more than 80 cycles) are obtained. In the mSi@GNG composite, preferential formation of a stable solid electrolyte interphase (SEI) on the surface of graphene sheets is achieved. The formation and components of SEI are identified for the first time by using UV-resonance Raman spectroscopy and Raman mapping, which will revive the study of formation and evolution of SEI by Raman. New mechanism is proposed that the giant graphene sheets protect the mSi particles from over-lithiation and fracture. Such a simple and scalable method may also be applied to other anode systems to boost their energy and power densities for LIB.
URI: https://hdl.handle.net/10356/81123
http://hdl.handle.net/10220/39053
ISSN: 2045-2322
DOI: 10.1038/srep15665
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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